﻿Plate 22 

 Siphonides rickettsi, new species 



1, Map of visceral anatomy, constructed from both type and paratype; X 5. 



The section shown includes the portion of whole animal between horizontal 

 lines of figure 4. Only the ventral muscle bauds of paratype are shown in 

 lower part of figure. The nephridia are from type. Coecum and wing 

 muscles of rectum not lettered and only a few coils of the intestinal spiral 

 are indicated. The simple contractile vessel along esophagus is shown by 

 dotted line. 



2, One of the hooks of introvert; X 500. 



3, A gland from ridge between consecutive rings of hooks; X 500. 



4, Diagram of entire animal; X 1. Between the horizontal lines is portion 



shown in figure 1; the dot is anus and the two vertical lines are the ventral 

 retractors. 



5, Left nephridium of paratype, which has a short anterior lobe, showing attach- 



ment to body wall, the large nephrostome, and cleavage of longitudinal 

 muscles. The origin of left dorsal retractor (RD) is from muscle bands 2 

 and 3 with a few fascicles from 1 and 4; X about 10. 



6, The mammiform glands of skin, the upper two in profile; X 50. Probably 



normally all are capped by an elongate papilla as sliown on left. It is 

 sometimes brownish. 

 A, anus; CF, nephrostome; F, fixing muscle of intestine; /*S, intestinal spiral; 

 N, N^, the two lobes of nephridium; RD, RV, dorsal and ventral retractors; 

 S, spindle muscle. 



Plate 23 



1, Golfmgia tnargaritacea californien-ns, new subspecies. Dissection of paratype; 



X 7.5. 1, a, Two eggs of californiennis (larger) and two from Dutch Har- 

 bor specimen of margarilacea; X 7.5. 



2, G. viargaritacea calif or nicnsis. Central portion of visceral complex further 



enlarged. A section has been removed from the ventral retractors; and 

 the base of the muscles is not shown. 



3, Golfingia margarilacea, (Sars) Alaskan form, Dutch Harbor, Unalaska, X 4. 



Central portion of visceral complex to show the fixing muscles, 1 to 4 

 being normal. In specimen from Kilisnoo, 2 is double and an extra, 2, a, 

 is present. In Kate Island, British Columbia, specimen, 4 is completely 

 double. F' or F^ are occasionally absent in Alaskan specimens, and F^ and 

 F* are sometimes attached to intestine close together. 

 A, anus; C, coecum; F^ to F*, faxing muscles; A'', nephridium; NO, nuchal organ; 

 0, esophagus; RD, dorsal retractor; RV, ventral retractor. 



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