bearing both notosetae and neurosetae. Bran- 

 chiae from setiger 2 to posterior segments, 

 each gill straplike and separate from notopodial 

 lobes. Notopodia of anterior feet (Figure lOr) 

 with di.stinct presetal lamellae, and larger 

 rounded postsetal lamellae; neuropodia similar 

 but smaller. All lamellae of posterior feet (Fig- 

 ure 10s) smaller, the postsetal lamellae of neuro- 

 podia being mere ridges. No sign of genital 

 pockets between neuropodia of middle segments. 

 Pygidium with four anal cirri. Notosetae as 

 narrow-bladed capillaries throughout, there 

 being no notopodial hooks. Neurosetae as capil- 

 laries in anterior feet but capillaries mainly 

 replaced by 8-12 hooded hooks from 12th foot. 

 Individual hooks (Figure lOt) with a series of 

 four denticles above main fang. 



Re»iarks. — The genus Microspio Mesnil with 

 its type species Spio Diccziiikdiciaiiiis Claparede, 

 has had a checkered history and even now its 

 status is controversial. Discussions will be found 

 in Soderstrom (1920), Fauvel (1927), Holmquist 

 (1967), and Foster (1971). Microspio has bran- 

 chiae from setiger 2, while Spio has branchiae 

 from setiger 1. According to Soderstrom, Micro- 

 spio may also be distinguished from Spio by the 

 possession of only two dorsal ciliated organs 

 per segment instead of four, but this distinction 

 demands staining and sectioning. Unfortunately 

 Soderstrom confused these clear distinctions 

 by including other species in the genus Mirm- 

 .sp/o which have gills from setiger 1. Holmquist 

 has shown that these should be transferred to 

 other genera. Foster gives a useful list of the 

 species which may be included in Microspia 

 which she regards as a subgenus oi Spio. Hart- 

 man (1959a) listed Mirraspio as a synonym of 

 Pamspio Czerniavsky but the original diagnosis 

 states that Pamspio has branchiae on all setig- 

 erous segments and, as Holmqui.st .states, it 

 is a .synonym of Spio. 



Spiophaiies piginoittita Reish was trans- 

 ferred to the genus Nerijiidc^ by Hartman ( 1961) 

 but the latter genus has the anterior branchiae 

 fused to the notopodial lamellae and the pro- 

 .stomium has a well-developed occipital tentacle. 

 Hartman (1969: 91) also described another 

 species. Nrri)iides maciilata from southern Cali- 

 fornia, which Foster (1971) refers to as Spio 

 (Microspio) macidata. It is closely allied to 

 Spiopliaiies piginentata but it lacks the brown 

 patch on the prostomium, the hooks appear in 



the neuropodium of setiger 11 not 12, and they 

 have two small teeth in tandem above the main 

 fang instead of three to five. 



/?(.ro/r/.s.— Off Beaufort in 40-80 m (*). 



Distribntio)!. — Southern California "in shelf 

 depths" 



Laonice cirrata (Sars. 18.51) 



Luouici cii-i-atti. - Fauvel, 1927: 38, Fig. 12 a-e. - 

 Day. 1967: 480, Fig. 18.6. h-k. - Hartman, 

 19(59: 107, Fig. 1-4. - Foster, 1971: 

 69, Fig. 155-160. 



/?(co;y/.s.— Off Beaufort in 80-120 m (*). 

 Dist)-il)iition. — Cosmopolitan from the Arctic 

 to the Antarctic from ;^>0 m to abyssal depths. 



Nerinides unidentala New Species 



//„/o//y;;( .— USNM 43150. 



Dc^criptio)!. — Holotype incomplete with only 

 24 segments measuring 6 mm. No color mark- 

 ings. Prostomium (Figure lie) sharply pointed 

 anteriorly and produced as a blunt keel to seti- 

 ger 1. Two pairs of eyes and a large, erect 

 occipital tentacle. Setiger 1 well developed with 

 both notosetae and neurosetae. Dorsum flat- 

 tened and without membranous crests. Gills 

 from setiger 2 to end of fragment (setiger 24). 

 Anterior gills (Figure 110 completely fused to 

 notopodial lamellae, but 8th and succeeding 

 feet with shorter postsetal lamellae and gills 

 free and well tapered (Figure llg). Neuropodial 

 lamellae prominent, oval, never bilobed. No 

 genital pockets. Notosetae as limbate capillaries, 

 often with punctate shafts. Anterior neurosetae 

 similar. Inferior sabre-setae with punctate 

 blades (Figure llh) from setiger 12. Hooded 

 hooks from setiger 20, each with a blunt uni- 

 dentate tip (Figure llj). 



Remarks. — This species agrees with zV. ktiight- 

 j())i('si de Silva from Ceylon in having uniden- 

 tate hooded hooks but differs in the shape of 

 the prostomium, in having the branchiae com- 

 pletely fused to the dorsal lamella on the first 

 few feet and in having hooded hooks in the 

 neuropodia of setiger 20, not setiger 43. 



Records. — One specimen off Beaufort in 10 m 

 (*). 



76 



