282 PROCEEDINGS OF THE ACADEMY OF [April, 



MALDAKIDJE. 



Maldane disparidentata Moore. 



Maldane disparidentata Moore, Proc. Acad. Nat. Sci. Phila., 1904, pp. 

 494-496; PI. XXXVIII, figs. 28-31. 



This species occurs in the collections from San Diego only, but 

 appears to be quite common there. 



One bottle contains, along with a specimen of this annelid, a small 

 amphipod determined by Prof. S. J. Holmes as Melita sp. which the 

 label states lives commensally in its tube. From M. biceps, to which 

 it is most nearly related, this species is readily distinguished by 

 having more numerous and blunter teeth on the anterior division of 

 the cephalic limbus, the last preanal segment uniannulate instead of 

 biannulate, and the emargination on the ventral division of the caudal 

 funnel entire instead of emarginated and slightly lobate. The fringed 

 setse are of the bispiral type. 



Clymenella rubrocincta Johnson. 



Clymenella rubrocincta Johnson, Proc. Bos. Soc. Nat. Hist., XXIX (1901), 

 pp. 418, 419; PI. 13, figs. 128-133. 



The anterior half of one was taken between tides at San Diego. 



AMMOCHARIDJE. 



Ammoohares occidentalis Johnson. 



Ammochares occidentalis Johnson, Proc. Bos. Soc. Nat. Hist., XXIX (1901), 

 pp. 420-421; PI. 14, figs. 140-142. 



A single example from San Diego. It is a beautifully preserved 

 specimen 30 mm. long, with 22 setigerous segments. A fragment of 

 a tube is formed entirely of particles of shells. 



Sclerocheilus pacificus sp. nov. (Plate IX, fig. 59). 



Form as in Scalibregma, clavate, the posterior two-thirds slender 

 and of nearly uniform diameter but tapering slightly caudad; the 

 anterior one-third abruptly swollen to three times the posterior 

 diameter. Length 25-35 mm., maximum diameter 2.5-3.6 mm. 

 Segments 60-72. 



Prostomium depressed T-shaped, the basal part about as broad 

 as long and nearly half as wide as the peristomium, into which it is 

 deeply retracted. Antero-lateral limbs blunt projections each about 

 half as long as the width of the body of the prostomium. On each 

 side of the posterior dorsal region is a broad, black oblique streak 

 which appears to be constituted of two parallel rows of small pigment 

 specks. At their anterior ends they are separated by one-half the 

 width of the body of the prostomium, but diverge as they pass back- 

 ward beneath the peristomial fold apparently into the nuchal organs. 



