THE BURROWING BARNACLES (CIRRIPEDIA: ACROTHORACICA) 107 



The larva: C. newmani retains the larva to the cyprid stage. The 

 larvae resemble C. melampygos in its apparent lack of swimming 

 appendages. Like C. melampygos, it infects the host heavily. An 

 estimated 115 specimens were recovered from one Turbo shell. This 

 might reflect its inabihty to swim from one host to another. The 

 larva, after treatment with KOH, exhibited faint "peg plates," a 

 pair of strong antennules, and many bristles. There was an apparent 

 lack of eyes, although this point should be pursued further in living 

 material, inasmuch as the male also apparently lacked the naupliar 

 eye. The major bristle projecting from the posterior end of the larva 

 was contained within a thin transparent sheath for a short distance. 



The species can be differentiated from other species by the presence 

 of a large postlateral-bar tooth in C. newmani, whereas C. variabilis 

 has essentially none, and another species (p. 112) has a massive claw- 

 like tooth. C. newmani has two pairs of massive, gnarled hillocks 

 with serrated spines, knobs, and hairs, whereas C. variabilis and the 

 other species have simpler and more slender spines set directly on 

 the operculum. 



Cryptophialus lanceolatus, new species 



Figure 28 



Diagnosis: Cryptophialus with three pairs of cirri; no mouth 

 cirri; two dorsal body appendages. Operculum armed with at least 

 two pairs of heavy pinnate spines on the outer margin, small serrated 

 teeth, and several long, hyaline shafts which may be barbed on the 

 medial surface. Lateral bars associated with a row of bifid teeth on 

 ventral side, and an array of teeth at the posterior end. 



Etymology: lanceolatus (L.), lance-like, armed with a pointed 

 weapon, for the barbed spines on the operculum. 



Distribution: Several dozen specimens examined from Tridacna 

 maxima Roding from Heron Island, Capricorn Group, Queensland, 

 Australia (type-locality). One Turbo speciosus from Heron Island had 

 ten specimens of C. lanceolatus, eight of C. heterodontus, and two of 

 Weltneria reticulata. 



Type-material: Holotype: USNM 122620. Paratypes: Aust, Brit, 

 SFSC, Vict. Additional material: BPB, Belg, BA, CA, Dublin, Mex, 

 Paris, Seto, UCT. 



Dimensions: Average of five specimens: 1.77X0.93X0.69 mm 

 in length, dorsoventral width, and thickness, with an aperture 0.37 

 mm long. 



327-241 O - 69 - 8 



